Wire, rod (bar) made of X2CrNiMo18-4-3

Equivalent

Manufacture

X2CrNiMo18−4-3 grade is classified as a stainless corrosion resistant simple heat-resistant steel of austenitic class. It is smelted in electric-arc furnaces. This grade complies with rigorous requirements of national standards.

X2CrNiMo18−4-3 steel relates to a group of high-alloyed alloys of austenitic class. They are used in manufacture of welded constructions for extracting phosphorus acids and similar compositions that are characterized by a high corrosive power. It has a high resistance to knife-line and intercrystalline corrosion. This allows using it in corrosive environments in temperature range of up to +80°С. Resistance of welding seams is the same as in the main metal. Welding seams have a corrosion rate of 0,041−0,11 mm/h in atmosphere of carbamide synthesis.

Temperature of hot working (rolling and forging) at the beginning is 1170 °C and 900 °C at the end. This steel can be satisfactorily cut. It has a good weldability by method of automatic and manual welding. Manual electric-arc welding requires an application of electrodes of grade OZL-20, which have a wire core 03H17N14M2. The same wire is applied in atmosphere of shielding gas or at automatic welding under flux.

Physical properties at t° of 20°С:

— Heat conductivity is 0,134 10² V/(m К).

— Density is 7,7 103 kg/m3

— Module of elasticity is 17,8 10 — 4 N/mm2

— Hardness is 200 HB MPa -1

— Unit-area resistance is 0,75 Ohm-mm2/m;

— Magnetic permeability is 1.255 micro-tesla/m in H field

Application

Manufacture of chemical welded equipment such as heat-exchangers, reactors, pipelines. Manufacture of parts of mining equipment, chemical tanks that operate in extracted phosphorus, 55% sulfuric, acetic acids and other corrosive environments up to a temperature of 80 °C. X2CrNiMo18−4-3 grade is used in equipment that is intended for making of mineral fertilizers, welding wire, welding electrodes (for joint of nozzle parts, pipe joints, pipes with apparatus casing, repair of welding composition of tools that work in radioactive environment). X2CrNiMo18−4-3 wire is utilized as a means of welding electrode during welding of installations for production of ethylene, ammonia, carbon disulfide, hydrogen and other chemical elements.

Supplier

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